add test for tcp reuse

testdata/tcp_reuse.tdir/tcp_reuse.conf

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+server:
+	verbosity: 5
+	# num-threads: 1
+	interface: 127.0.0.1
+	port: @PORT@
+	use-syslog: no
+	directory: .
+	pidfile: "unbound.pid"
+	chroot: ""
+	username: ""
+	do-not-query-localhost: no
+
+	tcp-upstream: yes
+
+forward-zone:
+	name: "."
+	forward-addr: "127.0.0.1@@TOPORT@"

testdata/tcp_reuse.tdir/tcp_reuse.conf2

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+# this is the upstream server that has pipelining and responds to queries.
+server:
+	verbosity: 1
+	# num-threads: 1
+	interface: 127.0.0.1
+	port: @PORT@
+	use-syslog: no
+	directory: .
+	pidfile: "unbound2.pid"
+	chroot: ""
+	username: ""
+	do-not-query-localhost: no
+
+	log-queries: yes
+	log-replies: yes
+	log-identity: "upstream"
+
+	local-zone: "." refuse
+	local-zone: "example.com" static
+	local-data: "www.example.com  A 10.20.30.40"
+	local-data: "www1.example.com  A 10.20.30.41"
+	local-data: "www2.example.com  A 10.20.30.42"
+	local-data: "www3.example.com  A 10.20.30.43"
+	local-data: "www4.example.com  A 10.20.30.44"
+
+# if queries escape, send them to localhost
+forward-zone:
+	name: "."
+	forward-addr: "127.0.0.1@@TOPORT@"

testdata/tcp_reuse.tdir/tcp_reuse.dsc

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+BaseName: tcp_reuse
+Version: 1.0
+Description: Test tcp stream reuse.
+CreationDate: Wed Jun 03 09:37:00 CET 2020
+Maintainer: Wouter Wijngaards
+Category: 
+Component:
+CmdDepends: 
+Depends: 
+Help:
+Pre: tcp_reuse.pre
+Post: tcp_reuse.post
+Test: tcp_reuse.test
+AuxFiles: 
+Passed:
+Failure:

testdata/tcp_reuse.tdir/tcp_reuse.post

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+# #-- tcp_reuse.post --#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# source the test var file when it's there
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+#
+# do your teardown here
+. ../common.sh
+kill_pid $UPSTREAM_PID
+kill_pid $UNBOUND_PID
+if test -f unbound2.log; then
+	echo ">>> upstream log"
+	cat unbound2.log
+fi
+if test -f unbound.log; then
+	echo ">>> unbound log"
+	cat unbound.log
+fi

testdata/tcp_reuse.tdir/tcp_reuse.pre

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+# #-- tcp_reuse.pre--#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# use .tpkg.var.test for in test variable passing
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+
+PRE="../.."
+. ../common.sh
+get_random_port 2
+UNBOUND_PORT=$RND_PORT
+UPSTREAM_PORT=$(($RND_PORT + 1))
+echo "UNBOUND_PORT=$UNBOUND_PORT" >> .tpkg.var.test
+echo "UPSTREAM_PORT=$UPSTREAM_PORT" >> .tpkg.var.test
+
+# make config file
+sed -e 's/@PORT\@/'$UNBOUND_PORT'/' -e 's/@TOPORT\@/'$UPSTREAM_PORT'/' < tcp_reuse.conf > ub.conf
+# start unbound in the background
+#$PRE/unbound -d -c ub.conf >unbound.log 2>&1 &
+$PRE/unbound -d -c ub.conf 2>&1 | tee unbound.log &
+UNBOUND_PID=$!
+echo "UNBOUND_PID=$UNBOUND_PID" >> .tpkg.var.test
+wait_unbound_up unbound.log
+
+# make upstream config file
+sed -e 's/@PORT\@/'$UPSTREAM_PORT'/' -e 's/@TOPORT\@/'$UPSTREAM_PORT'/' < tcp_reuse.conf2 > ub2.conf
+# start upstream unbound in the background
+#$PRE/unbound -d -c ub2.conf >unbound2.log 2>&1 &
+$PRE/unbound -d -c ub2.conf 2>&1 | tee unbound2.log &
+UPSTREAM_PID=$!
+echo "UPSTREAM_PID=$UPSTREAM_PID" >> .tpkg.var.test
+wait_unbound_up unbound2.log
+
+cat .tpkg.var.test
+

testdata/tcp_reuse.tdir/tcp_reuse.test

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+# #-- tcp_reuse.test --#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# use .tpkg.var.test for in test variable passing
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+
+PRE="../.."
+. ../common.sh
+
+get_make
+(cd $PRE; $MAKE streamtcp)
+
+echo "> query www1.example.com."
+$PRE/streamtcp -f 127.0.0.1@$UNBOUND_PORT www1.example.com. A IN >outfile 2>&1
+cat outfile
+if test "$?" -ne 0; then
+	echo "exit status not OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound2.log 
+	cat unbound.log
+	echo "Not OK"
+	exit 1
+fi
+if grep "www1.example.com" outfile | grep "10.20.30.41"; then
+	echo "content OK"
+else
+	echo "result contents not OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound2.log 
+	cat unbound.log
+	echo "result contents not OK"
+	exit 1
+fi
+echo "OK"
+echo ""
+
+# this should be reused on the same tcp stream:
+echo "> query www2.example.com."
+$PRE/streamtcp -f 127.0.0.1@$UNBOUND_PORT www2.example.com. A IN >outfile 2>&1
+cat outfile
+if test "$?" -ne 0; then
+	echo "exit status not OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound2.log 
+	cat unbound.log
+	echo "Not OK"
+	exit 1
+fi
+if grep "www2.example.com" outfile | grep "10.20.30.42"; then
+	echo "content OK"
+else
+	echo "result contents not OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound2.log 
+	cat unbound.log
+	echo "result contents not OK"
+	exit 1
+fi
+
+echo "OK"
+exit 0